period

Hello, my name is Racquel and I need to ask a question about your birth control pill. I have been on it for a year now and i was just wondering sometimes my period starts the first day of the week 4 pills. This week it has not started and I am on the 4th pill, and I am getting kind of worried. I would just like to know if maybe this pill does this sometimes or if maybe I am pregnant.

Thank You,

Racquel Davis